This March, Patagonian guide Martin Jones, who has quietly led Boojum Expeditions trips in South America for 15 years, will realize a personal dream of his: leading the first ever guided horseback crossing of the continent. Ten client riders will join Jones, four Argentine gauchos, and Boojum owner Linda Svendsen for the 625-mile hoof from Chile’s Pacific shores through the Andes to Argentina’s Atlantic coast. You’ll pick your way along stock trails across central Patagonia, climbing 8,200-foot mountain passes and dropping down into the Chubut River Valley, continuing through the Argentine lowlands, and ending at the Valdés Peninsula. You need not be an expert horseman to sign up, but you should be comfortable spending three weeks in the saddle.